- #1
Elliott98
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Homework Statement
A bead slides on a wire, which is in a vertical plane, as shown in the diagram. Gravity acts in the -y direction. The bead starts at A, moving to the right with an initial velocity v. The wire is frictionless between A and D and between F and G, but there is friction between D and F. (For each statement select True, False, Greater than, Less than, Equal to, or Not enough information to tell.http:////d2vlcm61l7u1fs.cloudfront.net/media%2F62f%2F62f71b78-00b4-43a8-a92b-de3a1b48521b%2Fphp3BwzEE.png
http:////d2vlcm61l7u1fs.cloudfront.net/media%2F87b%2F87b2fab7-a0ac-403b-89aa-426164f8224c%2Fphp6TF9ue.png
Homework Equations
KE= (1/2)mv^2
PE = mgh
The Attempt at a Solution
a) The bead is sliding down with gravity with no friction, so the speed will increase. Answer = True?
b) The velocity of the bead at D is higher than at F because before D, there is no friction, but after D to F, Friction is present. Because the velocity is smaller at F than D, the KE is smaller at F than at D. Answer = Greater than?
c) There is no friction present and its a horizontal surface so speed remains constant form D to E. Answer = Equal?
d) Conservation of energy. Answer = Equal
I'm not sure if these are correct. Any help would be greatly appreciated. Thanks![/B]